TMUAmockz Set 1 Paper 2 · Question 16

Community mocks

TMUAmockz Set 1 Paper 2 · Q16

Paper 2Logic & proofNumber & counting

The expansion of $(x^a+x^{-b})^n$ , where $a,b,n$ are positive integers, contains a constant term. Which of the following is/are necessary and sufficient conditions for this, for some non-negative integer $k$ ?

I. $k(a+b)=an$
II. $k(a+b)=bn$
III. $ka=nb$

AI only

BII only

CIII only

DI and II only

EI and III only

FII and III only

Read the questions freely. Sign in to check your answer, see the worked solution and save your progress.